Adrive is optimal because of speed and size - up to 2gb. Even though adrive links go inactive after around two weeks to a month, the link can be reactivated without uploading. You can test it by watching the Avengers DVDRip.

MEGA is launching tomorrow. The genius of this is that files are encrypted locally before being sent to their servers which essentially absolves the company. It will be quite interesting how this plays out.
Free sign-ups will reportedly include 50GB (or ten bluray rips) of storage space.